Lago through 1.55.0 contains an authentication bypass vulnerability that allows organization administrators to obtain session tokens for existing accounts via the acceptInvite mutation without a password check. Attackers can invite a victim's email, accept with an arbitrary password, and receive a JWT to access the victim's organizations, billing data, API keys and payment integrations.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/getlago/lago-api/commit/5a9d5935b027d1db7171c7c015283d5870451305 patch
- https://github.com/getlago/lago-api/pull/6146 issue-tracking, patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.7 · getlagoNVD modified 2026-10-30 11:30
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 7
- https://github.com/getlago/lago-api/commit/5a9d5935b027d1db7171c7c015283d5870451305 patch
- https://github.com/getlago/lago-api/pull/6146 issue-tracking, patch
- https://github.com/getlago/lago-api/blob/v1.55.0/app/services/users_service.rb#L89-L98 technical-description
- https://github.com/getlago/lago-api/blob/v1.55.0/app/services/invites/accept_service.rb#L15-L16 technical-description
- https://abraxaslabs.tech/research/lago-invite-ato third-party-advisory
- https://github.com/getlago/lago-api product
- https://www.vulncheck.com/advisories/lago-through-1.55.0-authentication-bypass-via-acceptinvite-graphql-mutation third-party-advisory